test(e2e): read Dashboard sheet by name in working-hours export parity test

The export now adds the Dagsoversigt sheet as the first tab, so the Dashboard
data is no longer the first sheet. Select the Dashboard sheet by name instead
of by position so the JSON-parity comparison targets the correct sheet.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: renemadsen

eform-client/playwright/e2e/plugins/time-planning-pn/a/time-planning-working-hours.export.spec.ts

@@ -47,8 +47,11 @@ test.describe('Time planning plugin working hours export', () => {
     const generatedContent = fs.readFileSync(downloadPath!);
     const fixtureContent = fs.readFileSync(fixturesPath);
 
+    // The export now adds a localized "Dagsoversigt" (Day overview) sheet as the first tab,
+    // so the Dashboard data is no longer SheetNames[0]. Select the Dashboard sheet by name
+    // (the sheet this fixture represents) rather than by position.
     const wbGenerated = XLSX.read(generatedContent, { type: 'buffer' });
-    const sheetGenerated = wbGenerated.Sheets[wbGenerated.SheetNames[0]];
+    const sheetGenerated = wbGenerated.Sheets['Dashboard'];
     const jsonGenerated = XLSX.utils.sheet_to_json(sheetGenerated, { header: 1 }) as any[][];
 
     const wbFixture = XLSX.read(fixtureContent, { type: 'buffer' });